Invokana

— THERAPEUTIC CATEGORIES —
  • Diabetes

Invokana Generic Name & Formulations

General Description

Canagliflozin 100mg, 300mg; tabs.

Pharmacological Class

Sodium-glucose co-transporter 2 (SGLT2) inhibitor.

How Supplied

Tabs—30, 90, 500

Generic Availability

NO

Mechanism of Action

Canagliflozin is an inhibitor of sodium-glucose co-transporter 2 (SGLT2). By inhibiting SGLT2, canagliflozin reduces reabsorption of filtered glucose and lowers the renal threshold for glucose (RTG), and thereby increases urinary glucose excretion (UGE). Canagliflozin increases the delivery of sodium to the distal tubule by blocking SGLT2-dependent glucose and sodium reabsorption. This is believed to increase tubuloglomerular feedback and reduce intraglomerular pressure.

Invokana Indications

Indications

Adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus (T2DM). To reduce the risk of major cardiovascular (CV) events (eg, CV death, nonfatal MI and stroke) in adults with T2DM and established CV disease. To reduce the risk of end-stage kidney disease (ESKD), doubling of serum creatinine, CV death, and hospitalization for heart failure (HF) in adults with T2DM and diabetic nephropathy with albuminuria >300mg/day.

Limitations of Use

Not recommended to improve glycemic control in type 1 diabetes. Not recommended in adults with T2DM with an eGFR <30mL/min/1.73m2.

Invokana Dosage and Administration

Adult

Take before first meal of the day. eGFR ≥60mL/min/1.73m2: initially 100mg once daily; may increase to max 300mg once daily for additional glycemic control. eGFR 30–<60mL/min/1.73m2: max 100mg once daily. eGFR <30mL/min/1.73m2: do not initiate, however with albuminuria >300mg/day: may be continued at 100mg once daily (for reducing risk of ESKD, doubling of serum creatinine, CV death, and hospitalization for HF). Concomitant UGT inducers (eGFR ≥60mL/min/1.73m2): increase to 200mg once daily in patients currently tolerating 100mg, max 300mg once daily; (eGFR <60mL/min/1.73m2): increase to max 200mg once daily in patients currently tolerating 100mg once daily.

Children

<18yrs: not established.

Invokana Contraindications

Not Applicable

Invokana Boxed Warnings

Not Applicable

Invokana Warnings/Precautions

Warnings/Precautions

Assess renal function prior to starting and as clinically indicated. Prior to initiation, assess and correct volume status in those with renal impairment, elderly, or on loop diuretics; monitor during therapy. Precipitating conditions for diabetic ketoacidosis (acute febrile illness, reduced caloric intake, ketogenic diet, surgery, insulin dose reduction, volume depletion, and alcohol abuse). Assess for ketoacidosis in presence of signs/symptoms of metabolic acidosis, regardless of blood glucose levels; discontinue if suspected; evaluate and treat if confirmed. Monitor for resolution of ketoacidosis before restarting. Withhold (at least 3 days), if possible, prior to major surgery or procedures associated with prolonged fasting. Increased risk for lower limb amputations. Consider risk factors that may predispose to amputations prior to initiation (eg, prior amputation, peripheral vascular disease, neuropathy, diabetic foot ulcers). Monitor for foot infection (including osteomyelitis), new pain or tenderness, sores or ulcers in lower limbs; discontinue if occur. Necrotizing fasciitis of the perineum (Fournier's gangrene); discontinue and treat immediately if suspected; use alternative antidiabetic. Monitor for genital mycotic infections, UTIs (including urosepsis, pyelonephritis); treat if indicated. Discontinue if hypersensitivity reactions occur; treat and monitor until resolved. Consider bone fracture risks before initiation. Renal impairment. Severe hepatic impairment: not recommended. Pregnancy (during 2nd & 3rd trimesters), nursing mothers: not recommended.

Invokana Pharmacokinetics

Absorption

Absolute bioavailability: ~65%.

Distribution

Volume of distribution: 83.5 L. Plasma protein bound: 99%.

Metabolism

Glucuronidation. 

Elimination

Fecal, renal. Half-life: 10.6 hours (100 mg); 13.1 hours (300 mg).

Invokana Interactions

Interactions

Antagonized by UGT inducers (eg, rifampin, phenytoin, phenobarbital, ritonavir): see Adult dose. Concomitant digoxin: monitor. May need a lower dose of concomitant insulin or insulin secretagogue (eg, sulfonylurea) to reduce risk of hypoglycemia. May antagonize serum lithium concentrations; monitor levels more frequently. May result in false (+) urine glucose tests or unreliable measurements of 1,5-AG assay; use alternative methods to monitor glycemic control.

Invokana Adverse Reactions

Adverse Reactions

Female genital mycotic infections, UTIs (may be serious), increased urination; lower limb amputation, hypotension, ketoacidosis (may be fatal), acute kidney injury, hypoglycemia, bone fractures; rare: Fournier's gangrene.

Invokana Clinical Trials

See Literature

Invokana Note

Not Applicable

Invokana Patient Counseling

See Literature

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